One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,6,11,9)(4,7,12,14)(10,13,16,15)(17,18,23,25)(19,26,20,24)(21,27,28,22)(29,32,31,30)(1,2)(3,6)(4,7)(5,8)(9,11)(10,13)(12,14)(15,16)(17,19,23,20)(18,24,25,26)(21,31,28,29)(22,30,27,32)(33,34)(35,39)(36,40)(37,38)(41,47)(42,45)(43,48)(44,46)(4,12)(7,14)(10,16)(13,15)(18,25)(22,27)(24,26)(30,32)(34,38)(39,45)(40,46)(47,48) involution — undirected(1,2)(3,9)(4,7)(5,8)(6,11)(10,15)(12,14)(13,16)(17,20,23,19)(18,26,25,24)(21,29,28,31)(22,32,27,30)(33,35,37,42)(34,39,38,45)(36,43,44,41)(40,48,46,47)(1,3,5,11)(2,6,8,9)(4,10,12,16)(7,13,14,15)(17,21,23,28)(18,27,25,22)(19,29,20,31)(24,30,26,32)(33,36,37,44)(34,40,38,46)(35,41,42,43)(39,47,45,48)(1,4,5,12)(2,7,8,14)(3,10,11,16)(6,13,9,15)(17,22,23,27)(18,28,25,21)(19,30,20,32)(24,29,26,31)(33,34)(35,39)(36,40)(37,38)(41,47)(42,45)(43,48)(44,46)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.